<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        p{
           color: red; 
           font-size: 30px;
        }
    </style>
</head>
<body>
    <p>我是首页</p>
    <a href="./product.html">产品</a>
</body>
</html>